function show_drown(obj){
	$(obj).children(".menu_zh1").show();
}
function hide_drown(obj){
	$(obj).children(".menu_zh1").hide();
}
function show_drown2(obj){
	$(obj).children(".menu_zh2").show();
}
function hide_drown2(obj){
	$(obj).children(".menu_zh2").hide();
}